[m-rev.] for review: improve error messages for missing foreign values in foreign_enum pragmas

[Julien Fischer]

On Fri, 17 Jun 2016, Zoltan Somogyi wrote:

> On Fri, 17 Jun 2016 14:36:07 +0200 (CEST), "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
>> Go ahead and commit. I will have a look later.
>
> For review by Julien.
>

> Improve slightly the error messages for missing foreign enums.
> 
> compiler/add_foreign_enum.m:
>     As above.

That looks fine.

Julien.